Quetzals are strikingly colored birds in the trogon family (Trogonidae). They are found in forests and woodlands, especially in humid highlands, with the five species from the genus Pharomachrus being exclusively Neotropical, while the single Euptilotis species is almost entirely restricted to western Mexico (marginally also in adjacent U.S. states). They are fairly large (all over 32 cm or 13 inches), slightly bigger than other trogon species. Trogons have iridescent green or golden-green wing coverts, back, chest and head, and a red belly. They are strongly sexually dimorphic, and parts of the females' plumage is brown or grey. These largely solitary birds feed on fruits, berries, insects and small vertebrates (e.g. frogs), and can, despite the bright plumage, be surprisingly difficult to see in their wooded habitats.